jsp和servlet之间传递vector的问题
asper 2003-06-11 12:57:40 为什么从servlet中返回的vector是空的?
服务器是weblogic 7.0
test.servlet源程序:
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
public class test extends HttpServlet {
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException, ServletException {
response.setContentType("text/html");
Vector v=new Vector();
v.add("aa");
v.add("bb");
request.setAttribute("abc",v);
response.sendRedirect("http://cg:7001/clubsite/index.jsp");
}
}
index.jsp页面
<%@page import=java.util.*%>
asdfqasdf
<%
Vector a=(Vector)request.getAttribute("abc");
if(a==null){
out.println("<p>a is null");
}
%>
结果是页面上显示有:a is null